Rotary embroidering machine



April 21, 1936.

c. A. KAISER ROTARY EMBROIDERING MACHINE 2 4 Sheets-Sheet 1 Filed Oct. 20 193 INVENTORJ A TTORNE Y.

April Q A KA 5E ROTARY EMBROIDERING MACHINE 4 Sheets-Sheet 2 Filed Oct. 20, 1932 April 21, Q A KAl E ROTARY EMBROIDERING MACHINE 4 Shets-Sheet 5 Filed Oct. 20, 1932 JNVEINTOR.

ATT0RNEY3 April 21, 1936. c. A. KAISER ROTARY EMBROIDERING MACHINE Filed 001;. 20, 1 932 4 Sheets-Sheet 4 INVENTOR. @ZMQ A 7 ZW I ATTORNEY.

Patented Apr. 21, 1936 UNITED STATES PATENT OFFIE ails-1:125 v I ROTARY mmaomnamo MACHINE Charles A. Kaiser, Philadelphia, Pa. Application gctober 20, 1932, Serial No. 638,706 11 Claims. (01.11249) The object of this invention is to devise a novel construction of a rotary embroidering machine.

A further object of theinvention is to devise a novel embroidering machine wherein novel means are provided for forming the loops for placing. a

tension on the yarn or thread during the formation of the loops and novel means for holding a loop as the yarn or thread is being drawn durin the upward movement of the needle.

A. further object is to .devise a novel work holder and novel means for adjusting it together ing the loops which have been formed out of the path of the needle. It further comprehends a novel construction and arrangement of fabric feeding mechanism.

Other novel features of construction and advantage will hereinafter-more clearly appear in the detailed description and the appended claims. For the purpose of illustrating the invention I have shown'iri the accompanying drawings a typical embodiment of it, which, in practice, will 5 give satisfactory and reliable results. It is, how-' ever, to be understood that the various instrumentalities of which my, invention consists can be variously arranged and organized, and my invention is not limited to the exact arrangement and 40 organization of these instrumentaiities as herein set forth. l

Figure l is a sectional elevation of an embroidering machine embodying my invention.

Figure 2 is an exploded view of a. tension device employed.

Figure .3 is a front elevation of the tensiondevice showing it in the position it assumes when holding the yarn.

' 50 Figure 4 is a frontelevation of thetension de- Figure 5 is a perspective view of a compound 55 cam employed and parts controlled thereby.

Figure 6 is a front elevation, partly broken away, for the-sake of clearness of illustration.

Figure '7 is a transverse section, showing more clearly the relation between certain of the parts.

Figure 8 is a perspective view, showing certain 5 of the driving parts seen in Figure '7. I

Figure 9 is a perspective view of the machine, showing more particularly the work frame and the manner inwhich it is adjusted.

Figure 10 is a section on line l0-i0 of Figure io 14, showing more particularly the work carrier and its adjuncts.

Figure '11 is a section on line illlof Fi um '14.

Figure 12 is a perspective view, showing more 15 particularly the manner in which a manually releasable mechanism can be employed "for the feed of the work table.

Figure 13 is a detailed section of a portion of the construction seen in Figure 10.

Figure 14 is a perspective view.of a portion of the work table and its feeding mechanism.

Figure 15 is a section taken substantially on line l5-l5 of Figure 11.

Figure 16 is a perspective view, showing more 25 particularly the yarn being drawn-down by the needle: 1 I

Figure 17 is a perspective view, showing more particularly the manner in which the hook cooperates with the'yarn carried'by the needle. 3

Figure 18 is a perspective view of a hook carrier, and acam operated slide and certain of their adjuncts.

Figure 19 is a sectionaldetail showing the needle and hookin positions they assume during the operation.

Figure 20 is a viewsimilarto Figure '19 but showing the parts in different relation from that seenin Figure 19.

Figure 21 is a sectional detail, showing more 40 clearly, the manner in which preformed loops are moved out of the path of the needle.

Figure 22 is a sectional detail, showing more particularly a portion of the fabric feeding mechanism.

Similar numerals of reference indicate correspending parts.

Referring to the drawings:

l designates the frame of the machine, the construction and contour of which may vary widely in practice. 2 designates the main driving shaft which is operati'vely connected with an electric or other motor, in any desired manner, to be driven thereby. The shaft 2 is provided with a sprocket wheel 3 around which passes a sprocket chain 6 which latter also passes around a sprocket wheel fixed to a shaft 6 journalled in the machine.

frame. The shaft 6 has connected with it in any desired orconventional manner but eccentrically thereto, a driving arm 1, the free end of which I .is pivotally connected to the reciprocatory neeby a pin and slot connection with a link l3 con- 15 nected to an eccentric l4 having a grasping handle l5 whereby the presser foot can be raised and retained in such raised position.

The automatic yam tensioning mechanism The yarn l6, see Figure 9., passes from the cop I1 through suitable guides to a yarn tensioning device I8 of any desired or conventional construction, and, as shown in Figure 6, this consists of the conventional discs with aspring tending to move one towards the other. The yarn then passes to the automatic yarn clamping mechanism l9 which will now be described, reference being directed more particularly to Figures 1, 2, 3, 4 and 6. 28 designates a bar secured to the head of the frame I at opposite ends and on this bar is adjustably secured a block 2| having a rounded corner at its lower'portion. This block is fixed in its adjusted position by means of a fastening device 22. The needle bar 8 passes through an apertured block 23 which is fixed to it by means of a set screw 24. This block carries a yarn guide 25. Secured to the bottom of the block 23 by means of suitable fastening devices, is the rearwardly extending flange 28 of a bracket 21, the flange 25 is apertured as at 28 to permit the needle bar 8 to pass therethrough. The'free ends of the bracket 21 are deflected at right angles and apertured to receive a pivot pin 29 which passes through an apertured member 30 having its rear end rounded as at 3|. A yarn stop member in the form of a plate 32 is secured to the member 30 by means of fastening devices 33, certain of which also serve to secure to the member. 30 a curved strip 34. which, during the upward movement of the needle bar 8, engages the cam member formed by the block 2| thus moving the yarn contacting member 32 out of engagement with the yarn and opposing the action of the spring plate 35. The spring plate 35 is in the form of a strip of spring metal having one end secured to the flange 25 by means of a fastening device 36. The free end of the spring presses against the member 30 as will be clearly understood by reference to Figures 3 and 4, so that the tendency of this spring is to cause the yarn clamping member 32 to clamp the yarn against the block 23 except when it is moved into unclamped position, as seen in Figure 4.

Fabric feeding mechanism The main driving shaft 2 has fixed to it an eccentric 31 which drives aconnecting rod 38, the free endof which is connected with a rod 38 passing through offset arms of a rock shaft 40 which is tubular and mounted on a bearing rod 4| carried by bearings 42, see Figure 7. The shaft 39 has mounted on it one end of a reciprocatory bar 43 having its forward end bifurcated as at 44. 45 designates the fabric feed having the down-- wardly deflected flange 48 which is connected at 41 to the reciprocatory bar 43, see more particularly Figure 22. During the reciprocation of the fabric feed 45 it is given an up and down movement which will now be described. Referring now to Figure 8, it will be seen-that the 48 which actuates a connecting rod 49, the forward end of which is provided with a pin 50 which extends into a slot 5| of a link 52 fixed to a cam shaft 53 journalled in bearings 54. The shaft ,main driving shaft 2 has fixed to it an eccentric I 53 -has fixed to it a cam '55 positioned in the V bifurcated end 44 of the reciprocatory bar 43 so that the forward end of this bar is moved upwardly and downwardly during the reciprocation of such bar as will be hereinafter fully explained.

Loop controlling mechanism The shaft 2 has fixed to its 'free end a compound cam 56 having a cam surface 51 and a dwell 58 and a cam surface 58 which forms a continuation of a dwell 60. The frame I has a downward extension 6|, see Figure 1, to which is secured a bracket 62 by means of fastening devices 63. The bracket 62 has pivotally mounted in cam 56, see Figure 5. The hook carrier 64 has at its upper end a laterally extending curved hock 13. The hook carrier 84 has mounted on it a reciprocatory slide 14, see Figure 18, havingrollers 15 between which is disposed a cam 16 to effect the reciprocatory movement of the slide 14. The cam 18 is fixed to the main drive shaft 2. 'I'heupper end of the slide 14 is recessed, as at 11, to receive a working tool, such as, for

example, a punch which will form holes in the fabric through which the needle will pass or for cutting purposes.

The cam face 51 and dwell 58 cooperate with a roller 18 carried by a. binder bar 19 which has connected to it one endof a spring 80, see Figure 1, the opposite end of said spring being connected to a fixed point of the frame. This binder bar The work tensio'riing device I provide means to place a desired tension on the fabric during the embroidering operation.

The shaft 2, see Figural, is'provided with a gear 83 which meshes with a, gear 84 on a shaft 85 suitably journalled on the machine frame. This shaft is provided with a friction coupling 88 of any desired or conventional construction. The shaft 85 has connected withit by means of a flexible joint 81, a knurled roller "disposed at an angle to the shaft 85.. The presser foot I0 is provided with a spring 83 which presses the fabric which as: being embroidered against the knurled roller The work frame and its controlling mechanism The fabric 90 which a to 'be embroidered, see

I Figure 9, is secured in any desired manner to a frame III. This frame is mounted for relative rotation and movement towards the needle on a table 92 having upwardly projecting pins 93 to rotatably mounted in a bar 91, secured to the machine frame in any desired manner so as to be relatively movable therewith. The stem 90 is provided with a groove 98 into which is adapted to extend a locking member 99 carried by a flat 4 spring I00, one end of which is fixed in any desired manner to the support 91. The spring I has fixed to its free .end a wire IOI in order that it can be manually actuated to effect the release of the stem 96 so that the work and work holder can be removed as a unit from the machine wheh desired. The support IIIv has fixed to it a block I02 recessed to receive a stationary bar I03 having at its outer side the projecting pins I04. The top of the bar is provided with recesses, I05 into which is adapted to extend a locking member I06 carried by the free end ofa spring I01 the opposite end of which is fixed to the block I02 by means of a fastening device I08, see Figure 10. I09 designates a block having a recess IIO forming a clearance for the pins I04, see Figure 14. This block I09 is secured to the block I02 in spaced relationship thereto by means of fastening devices III so that the work support 91 is slidably mounted on the stationary bar I103. The block I09 has rotatably mounted on it a star wheel II2 having four arms radiating from it adapted to engage the pins I00. This star'wh eel H2 is provided with a grasping handle M3. The block I09 is provided with a recess Iii to receive the star wheel.

I provide means for retaining the preformed loops out of the path of the needle. The main driving shaft 2, see Figure 7, has fixed thereto a sprocket'wheel I I5 around which passes a sprocket I I6 which also passes around a sprocket wheel I I! fixed to a lay shaft IIO suitably mounted on the machine frame. I I9 with a shaft I20 which carries a rotary briish Hi. This brush I2I extends through an opening I22 in the table or bed I23 and brushing against the loops of the fabric 010 retains them out of thepath of the needle as is apparent.

The operation will now be apparent to those skilled in this art and is as follows.

The fabric 90 is secured to the work frame 9i and mounted on the work holder 92 so that the embroidering may start at the central portion of the fabric and may be formedoutwardly to the outer portions of the fabric. The presser foot I0 is moved downwardly and the spring 09 causes the fabricto engage the tension roll 88. The machine is now ready for embroidering. As the main driving shaft 2 revolves it will be apparent that the shaft 6 will be driven'by the sprocket chain 4 and a. reciprooatory movement will be imparted to the needle 9. .,The needle 9 passes The shaft H0 is intergeared at.

As the needle moves upwardly the cam 56 causes the forward movement of the binder or clamping bar I9 so that the yarn is clamped against the shoulder ll, see Figure 20. As soon as the strip 34 engages the cam member 2| the tension de- U vice will be released so that sufficient yarn canbe drawn from the bobbin or cop H for the for mation for the proper length of loop. As the needle 9 again moves downwardly the yarn clamping member 32 will bind the yarn as soon as the strip 34 passes out of engagement with the cam member 2| due to the action of the spring 35. The yarn is clamped all of the time except when the needle bar is going over dead center, at which time the feed of the fabric takes place. After each loop the fabric is advanced one step by the action of the fabric feeding member I5 which, as

is apparent, from Figure 8 and the description already given, moves upwardly and forwardly to advance the fabric and then moves downwardly and rearw'ardly. The knurled tension roll 88 which is continuously driven places a slight tension or stretch on the fabric during the embroidering operation. The slide 14 ismoved upwardly and downwardly by the cam. 16 and in case a heavy fabric is being embroidered a punch may be connected to the slide to form holes in the fabric' port. After each course the work frame is advanced one step by actuating the handle M3 to cause the star-wheel II2 to engage the pins I04.

It will, now be apparent that I have devised a new and useful rotary embroidering machine which embodies the features of advantage enumerated as desirable in'the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which will give in'practice satisfactory and reliable results, it is to be understood that this embodiment is susceptible of modification in various par- .ticulars without departing fromthe spirit or scope tages. Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:- I

1. In an embroidering. machine, a' reciprocatory needle bar, a needle carried thereby to receive the yarn,-a hook operative 'to retain a. loop beneath the fabric being embroidered, an automatic clamping device for the yarn" controlled by the movement of said needle bar, means to clamp the yarn during the upward movement of the needle, and means to oscillate said hook.

2. In an embroidering machine, a mainv driving shaft, a needle bar and its needle reciprocated thereby, an oscillatinghook cooperating with the yarn carried by the needle to form a loop, a yarn clamping device controlled by the needle bar to determine the length of yarn withdrawn for the formation of a loop.

3. In an embroidering machine, a main driving shaft, a needle bar andits'needle reciprocated thereby, an oscillating hook cooperating with the yarn carried by the needle to retain a loop, a reciprocatory yarn clamp operative to clamp the yarn in proximity to the needle after the formation of the loop, cam means actuated by said driving shaft to oscillate said hook and to recip rocate said yarn clamp, and an automatic clamping device to determine the length of yarn withdrawn for the formationof a loop, said clamping device being adjustable to vary the length of yarn withdrawn for the formation of 'a loop and being unclamped by the movement of the needle bar.

4. Inv an embroidering machine, a main driving shaft, a needle bar and its needle reciprocated thereby, cam means on said driving shaft, a hook carrier oscillated by said means to form a loop and retain it during the upward movement of the needle, a slide on said hook carrier and reciprocated by said cam means, and a reciprocatory yarn clamp also actuated by said cam means.

5. In an embroidering machine, a main driving shaft, a needle bar and its needle reciprocated thereby, a compound cam driven by said shaft, a hook having yarn engaging movements controlled by said cam and efiective to center a loop in the yarn, a yarn clamp controlled by said cam to clamp the yarn after a loop has been formed, and an automatic yarn clamping device which is in clamped condition during the downward movement of the needle bar and which is automatically unclamped after a. predetermined upward travel 7. In an embroidering machine, a; needle bar and its needle, 9. block adjustably carried by said needle bar, a yarn clamping member pivotally supported on said needle bar to clamp the yarn against said block, a spring to retain said member in clamped condition, a second member connected with said clamping member, and an adjustably mounted releasing member in the path of said second member to effect the release of said clamping member while the needle bar is passing over dead center at the end of its upward stroke.

8. In an embroidering machine, a needle bar and its actuating means, a drive shaft for said means, acompound cam on said drive shaft, a rectilinear movable yarn clamp controlled by said cam, a loop retaining hook oscillated by said cam, and yarn clamping'means having releasing devices to release the yarn during the travel of the needle bar.

9. In an embroidering machine, a support, a work carrying table rotatable therein, means to lock said table with respectto said support, a stationary member on which said support is movable, and having spaced pins, and a manually actuated star wheel cooperating with said pins to eiiect the longitudinal feed of said support.

10. In an embroidering machine, a drive shaft, I

means to release said clamping member as it approaches the limit of its upward stroke.

- CHARLES A. KAISER. 

